Artículos de revistas
Intermediate Valence Effects In The Magnetic Behaviour Of Ce (rhxpt1-x)2 Laves Phase Compounds
Registro en:
Solid State Communications. , v. 42, n. 9, p. 659 - 665, 1982.
381098
10.1016/0038-1098(82)90812-2
2-s2.0-0020141371
Autor
Barberis G.E.
Roden B.
Weidner P.
Gupta L.C.
Davidov D.
Felner I.
Institución
Resumen
The complete series of solid solutions Ce (RhxPt1-x)2 (0 ≤ × ≤ 1) present a single cubic phase C15. The magnetic susceptibility and lattice parameters were measured, showing a big change in the temperature dependence of the susceptibility, which is explained as a change in the valence of the Ce ions, from 3+ (CePt2) to 3.5+ (CeRh2). This is supported by the lattice parameter study, which shows a non-linear relationship of the lattice parameter with the concentration x. We compare our results with previous works, and we also found a T2 dependence for the susceptibility in the low temperature region for the compounds presenting intermediate valence. This can be explained in the light of the Fermi liquid theory. © 1982. 42 9 659 665 Parks, (1977) Valence Instabilities and Related Narrow Band Phenomena, , Plenum, New York Falicov, Hank, Maple, (1981) Valence fluctuations in Solids, , North-Holland, Holland Holland-Moritz, Loewenhaupt, Schmatz, Wohlleben, Spontaneous Relaxation of the Local 4f Magnetization in CePd_{3} (1977) Physical Review Letters, 38, p. 984 Ottenwellm, Stewardson, Wilson, The M4,5spectrum of58Ce and the γ-α phase transition (1973) Journal of Physics B: Atomic and Molecular Physics, 6, p. 2184 Jayaraman, Fusion Curve of Cerium to 70 Kilobar and Phenomena Associated with Supercritical Behavior of fcc Cerium (1965) Physical Review, 137, p. A179 Shapiro, Axe, Birgeneau, Lawrence, Parks, (1977) Phys. Rev. B, 16, p. 2225 Buschow, (1979) Rep. Prog. in Physics, 42, p. 1373 Barberis, Davidov, Rettori, Donoso, Torriani, Gandra, (1980) Phys. Rev. Letters, 45, p. 1966 Lawrence, Murphy, (1978) Phys. Rev. Letters, 40, p. 961 Lawrence, (1979) Phys. Rev. B, 20, p. 3770 Beal-Monod, Lawrence, Paramagnon picture of the low-temperature susceptibility of some intermediate-valence compounds (1980) Physical Review B, 21, p. 5400 Lawrence, Beal-Monod, (1981) Valence fluctuations in Solids, p. 53. , L.M. Falicov, W. Hank, M.B. Maple, North-Holland, Holland Compton, Matthias, (1959) Acta Crystallog., 12, p. 851 Weidner, (1981) Diplomarbeit, , Universität zu Köln, West Germany